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\documentclass[11pt]{article}

\usepackage{hrms}  %% Page settings, style ... for the HRMS abstract book.

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\title{EMPIRICAL ROVIBRATIONAL ENERGY LEVELS OF METHANE UP TO POLYAD 6}

%% Note that \author and \address macros must be paired.
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%% The name(s) of author(s) presenting the work is(are) usually underlined.

\author{\underline{\FirstName K. \LastName KEFALA},
  \underline{\FirstName S.~N. \LastName YURCHENKO},
  \underline{\FirstName J. \LastName TENNYSON}}
\address{University College London, Gower St, London WC1E 6BT}

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%% to make sure that the author index is properly auto-generated.
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\author{\underline{\FirstName V. \LastName BOUDON},}
\address{Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS-Univ. Bourgogne
9 Avenue Alain Savary, BP 47 870, F-21078 Dijon Cedex France}

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%% Place below other \usepackage{ ... }, if you need other packages.
%% See http://www.tug.org/texlive/doc.html for a description of available packages.

%% The macros below will change the page head and foot.
%% Please, do not modify the content of the \fancyhead macro nor the \fancyfoot line.
\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhead[C]{{\footnotesize \textit{HRMS, 28th Colloquium, Dijon, France,
  Aug. 28 - Sept. 1, 2023}}}
\fancyfoot[C]{}
\renewcommand{\headrulewidth}{0.6pt}
\renewcommand{\footrulewidth}{0.6pt}

%% The hyperref package allows to include hyperlinks in a document.
%% See the instructions for abstract submission for more details.
%% WARNING: Make sure that this package comes LAST since it re-defines many LaTeX macros.
\usepackage[colorlinks=true,urlcolor=blue,linkcolor=blue,citecolor=blue]{hyperref}
\voffset -.65 cm

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\category {3}
\begin{document}

\maketitle  %% This will also build the list of author(s) and addresse(s).

%% Index macro(s): see the abstract samples and the instructions
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%% Place the body of your abstract below.
An extensive analysis of the available spectroscopic data on methane is being performed. The MARVEL (Measured Active Rotational-Vibrational Energy Levels) algorithm by Furtenbacher et al \footnote{
\href{https://doi.org/10.1016/j.jms.2007.07.005}{doi:10.1016/j.jms.2007.07.005},
Tibor Furtenbacher, Attila G. Cs\'{a}sz\'{a}r, Jonathan Tennyson, \textit{J. Mol. Spectrosc.},
\textbf{245}, 115-125, (2007).}  is used to provide accurate empirical rovibrational energy levels for methane. Experimental data are collected from 280 sources of which 159 provided useful data; these sources are evaluated and then added to a database of measured transitions with their experimental uncertainties. Each transition must have assigned quantum numbers for their upper and lower states and an uncertainty. A definitive transition list is being built starting from lower polyads and moving towards higher polyads and used as an input for MARVEL. The self-consistency of the input transitions is evaluated during the MARVEL procedure, and the uncertainties are adjusted accordingly until a self-consistent network of energy levels is achieved. As part of this process, the wrongly assigned or inaccurate transitions are either corrected or removed. The output of the procedure is a set of empirical energy levels with their respective uncertainties, derived from the inversion of the input measured lines which will be used to produce an improved Exomol line list suitable for high resolution studies. At the same time, the resulting energy levels will  be used for the attribution of quantum numbers to unassigned experimental transitions.

\end{document}
